My conversation with Riot support guy
"Can I know what I was chat restricted again for? I was definitely not toxic during my games." "Correct, you were not toxic." "Then why am I being chat restricted?" "Because your penalty is adjusting to you account health." "But you said that my health is improving. If that were the case, why is my penalty twice as large as the first one?" "Your penalties are adjusting to the level of you account. From what I can see, your account health is improving." "Again, if the health of my account is improving, and my penalties are adjusting to my account health, then why am I receiving more harsh penalties?" "We cannot go into detail."
What the actual fuck support guy?
Edit: Woohoo!! Lyte and Boourns to the rescue to actually tell me the reason.